Okay I got it to work by removing the first and last lines containing the "<vb:if..." and "</vb:if>" code. Now to reposition it somewhere that's a bit more appealing...
Also, I'm having the same issue as on the previous page where it links to the forum thread for the article instead of the article itself. Any ideas on how to change that?
Edit: Resolved the above with this code in the cms article template:
Code:
<!-- Facebook Like -->
<iframe src="http://www.facebook.com/plugins/like.php?href={vb:raw page_url}&layout=standard&show_faces=true&width=450&action=like&font=tahoma&colorscheme=light" scrolling="no" frameborder="0" allowTransparency="true" style="border:none; overflow:hidden; width:450px; height:75px"></iframe>
<!-- / Facebook Like -->